Interference Management in Two-Tier Heterogeneous Cellular Network with Reverse Duplex
Date Issued
2015
Date
2015
Author(s)
LIU, SHI-RONG
Abstract
The requirement for wireless communications service has explosively grown owing to the increasing number of mobile devices and mobile data traffic. To satisfy this requirement, heterogeneous cellular networks have been proposed and widely attracted attention both in cellular standards bodies as well as academic search. The idea that deploying multiple small cells with coexisting frequency in each of macro cells, forming called two-tier heterogeneous network, can increase overall throughput. The concept of coexisting frequency is spectrum sharing technique that also have been proposed to improve spectral efficiency. In this thesis, we will research the two-tier heterogeneous network (HetNet) with sharing spectrum in reverse duplex mode. That reverse duplex mode is that the direction of data transmission between macro and small cells is reverse, e.g., macro cell is in uplink mode, whereas small cells are in downlink mode, vice versa. Time/frequency division duplexing (TDD/FDD) can be implemented by above reverse duplex mode, called as reverse TDD/FDD. We can see this network as the interference channel model. We mainly propose an approximately optimal mechanism for interference management, which integrate reverse duplex mode and partial interference cancelling (PIC) scheme or multilevel partial interference cancelling (MPIC) scheme. In addition, we show its achievable overall sum-rate is characterized to within a constant-gapto- capacity property for all values of the channel parameters under one-side interference channel model, one-to-many interference channel model, and Multi-input Multi-output (MIMO) two-tier HetNet model. The other significant contribution we provided is on efficient and lowly complex computation of achievable sum-rate algorithm.
Subjects
reverse duplex
partial interference cancelling scheme
multilevel partial interference cancelling scheme
small cell
two-tier heterogeneous cellular network
within a constant-gap-to-capacity property
Type
thesis
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